Pole-piece-finishing machine



March 30 1926.

C. C. TALEEN POLE PIECE FNISHING MACHINE Filed NOV. 8, 1920 2Sheets-Sheet 1 TfmaMY/Vfrp A TTORNEY.

C. C. TALEEN POLE PIECE FINISHING MACHINE March 30 1926.

' Filed Nov. s, 1920 2 Sheets-Sheet 2 INVENTOR. C c\\^\/ @Neva/ ATTORNEY.

Patented Mar. 30, 1926.

UNITED STATES 1,578,562 PATENT OFFICE.

CARL C. TALEEN, OF DETROIT, MICHIGAN, ASSIGNOR TO VIILLIAM J.HAR'I'IG?,r Olli DETROIT, MICHIGAN.

POLE-PIIECE-FINISHING MACHINE.

Application `led November 8,1920. Serial No. 422,720.

To all whom t may concern:

Be it known that I,..CARL C. TALrinN, a citizen of the United States,and residing at Detroit, in the county of` W'ayne and State of Michigan,have invented a new and Improved Pole-Piece-Finishing AMachine, of whichthe following is a specification.

This invention relates to machines equipped with electrofmagneticdevices 'for holding irregular bodies through magnetic attractioninstead of by means of the jaws usually employed in mechanical chucks,and its object is to provide a machine of this character for rotatablysupporting thekpolepieces of electric machines and other devices i ofirregular shape, particularly those which have concave sides which maybe placed against the holder so that the other faces of the work may beaccessible to the workman.

This invention comprises a holder'in the 'form of a cylindrical body andan electromagnet within the body, means being provided for supplyingcurrent to the coil. when the holder is to be rendered active to holdthe work and to interrupt the current when the work is to be released,other means being provided to rotatably support the work holder.

It further consists in the details of construction illustrated in theaccompanying drawings and particularly pointed out in the claims.

In the drawings, Fig. 1 is an elevation of my improved machine. y Fig. 2is a plan of the magnetic work holder. Figs. 3 and 4 are sections on thelines 3-3 and 4 4 of Fig. 2. Fig. 5 is a perspective of a field core forelectric machines. y

Similar reference characters refer to like parts throughout the severalviews.

In Fig. 1 I have shown a frame 1 supporting a table 2 and secured to abase or floor 3. A constantly rotating line shaft 4 carries a frictionwheel 5 on which rests a disk 6 secured to the lower end of the shaft 7,ro-

A wire 18 extends from the4 extends from the current source to the baseof a switch 22 having` a contact 23,.and a wire 24 extends from thecontact 25 to the bracket 15. When the switch is closed, preferably bythe foot of the operator,'the rings 1,12 and 13 are 1n circuit.

Secured to the upper end of the spindle 9 is a work holder comprising ashort cylinder 28 of any desired metal to which the disks 29 aresecured, preferably by screws 30. These disks might be integral with thebody 28 but it is more'c'onvenient to make them separate as it permitsthe deep groove 32 to be cut longitudinally of the body to admit theiron core 33 and coil 34, which are held in position `by the screws 35and the spacing ring 36, preferably of brass, which is pressed down intothe groove v32 above they coil and around the upper end of the core.

The lead wires v37 and 38 connect the coil to the rings 12 and 13. A pin39may be mounted in the core in alinement with the spindle. i

In Fig. 5 I have shown a pole piece or core 40 for the field magnets ofsmall electric motors and generators. pieces are rolled in long bars tocorrect size and are then sawedV 0H to length and the holes 41 aredrilled and threaded. Sawing 0E these pieces leaves sharp edges whichmay injure the pole windings and the hands of the workmen. The concavefaces 42 curve to a cylinder slightly larger than the armature of theelectric machine to which such pole pieces belong and the work holder isof the same curvature as the faces 42. .The body 28 is formed with anarrow groove 43 to receive the guide strip 44 which serves to positionthe pole pieces. Y

The spindle 9 is set rotating and the operator drops a pole piece ontothe holder 28 so that the pin 39 enters the hole 41 thereof. The guidestrip 44 immediately positions the pole piece on the body 28 and theoperator closes the switch 22 which causes the core 33 to he energizedto hold the work in position. rlhevoperator then holds a file so thatthe sharp edges and fins at the ends of the work will contact with thefile as the work helder rotates, which results in these corners beingquickly slightly rounded. The operator then releases the switch, whichresults in the electro-magnet being denergized and he then pushes thepole piece off the holder with his file.

These pole It has been found that during such Work the file finally cutsinto the holder at certain definite points and I therefore mill out lgrooves in the ends of the body 28 to receive r4the inserts 4G Which arepositioned by doWelpins 47, end plates 29 and screws 30. These insertsare preferably of hard steel and save the holder' from being disfigured.

The details and proportions of the various parts may all be modified bythose skilled in the art Without departing from the spirit of myinvention as set forth in the following claims.

I claim:-

l. A holder for irregular Work consisting of a cylindrical body having adiametrical recess, a core Within the recess with its sides parallel toa diameter of the cylinder, and

a ring surrounding the outer end of the core and having its outer endconforming to the cylindrical surface of the body, and a pin extendingradially from said core to posi tion the Work on the body.

3. A holder for irregular Work consisting of a cylindrical body having adiametrical recess, a core Within the recess with its sides parallel toa diameter of the cylinder and having one end terminating in thecylindrical surface of the body, a coil on said core, a ring surroundingthe outer end of the core and having its outer end conforming to thecylindrical surface of the body, and a pin extending radially from saidcore to position the Work on the body comprising a strip extendingparallel to the axis of said body from the cylindrical surface thereofadjacent said pin.

4. A holder for irregular Work comprising a body having a convex surfaceto receive the work and a recess within said curved area, a core Withinsaid recess, a coil on said core Wit-hinsaid recess, anda ring fillingsaid recess around said core and outside of said coil, the outersurfaces of the core vand ring conforming to the curvature of thesurface of the body and a projection on said curved surface to positionthe Work.

5. A holder for irregular Work comprising a body having a convex curvedsurface to receive the Work and a recess Within said curved area, a coreand a coil thereon Within said recess, the outer end ofthe coreconforming to the curvature ofthe surface of the body at said recess anda projection on said curved surface to position the Work.

CARL C. TALEEN.

